How to output a string by using wildcards?
 

I'm trying to make a shell script, and for part of it I need to search through a file, find the ip in the file, and save ONLY the ip to another file. ( not the entire line that its on )
I understand grep has wildcards, where I could do something like,
"grep (...........) traceroute-output
for an ip address.

Any ideas? Thanks.

grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'

does this help'

man grep
/-o


Cheers,
Tink

great. Thanks for the quick help.